1 /* 2 * -- <linux/cdrom.h> 3 * General header file for linux CD-ROM drivers 4 * Copyright (C) 1992 David Giller, rafetmad@oxy.edu 5 * 1994, 1995 Eberhard Mönkeberg, emoenke@gwdg.de 6 * 1996 David van Leeuwen, david@tm.tno.nl 7 * 1997, 1998 Erik Andersen, andersee@debian.org 8 * 1998-2002 Jens Axboe, axboe@suse.de 9 */ 10 #ifndef _LINUX_CDROM_H 11 #define _LINUX_CDROM_H 12 13 #include <linux/fs.h> /* not really needed, later.. */ 14 #include <linux/list.h> 15 #include <uapi/linux/cdrom.h> 16 17 struct packet_command 18 { 19 unsigned char cmd[CDROM_PACKET_SIZE]; 20 unsigned char *buffer; 21 unsigned int buflen; 22 int stat; 23 struct request_sense *sense; 24 unsigned char data_direction; 25 int quiet; 26 int timeout; 27 void *reserved[1]; 28 }; 29 30 /* 31 * _OLD will use PIO transfer on atapi devices, _BPC_* will use DMA 32 */ 33 #define CDDA_OLD 0 /* old style */ 34 #define CDDA_BPC_SINGLE 1 /* single frame block pc */ 35 #define CDDA_BPC_FULL 2 /* multi frame block pc */ 36 37 /* Uniform cdrom data structures for cdrom.c */ 38 struct cdrom_device_info { 39 const struct cdrom_device_ops *ops; /* link to device_ops */ 40 struct list_head list; /* linked list of all device_info */ 41 struct gendisk *disk; /* matching block layer disk */ 42 void *handle; /* driver-dependent data */ 43 /* specifications */ 44 int mask; /* mask of capability: disables them */ 45 int speed; /* maximum speed for reading data */ 46 int capacity; /* number of discs in jukebox */ 47 /* device-related storage */ 48 unsigned int options : 30; /* options flags */ 49 unsigned mc_flags : 2; /* media change buffer flags */ 50 unsigned int vfs_events; /* cached events for vfs path */ 51 unsigned int ioctl_events; /* cached events for ioctl path */ 52 int use_count; /* number of times device opened */ 53 char name[20]; /* name of the device type */ 54 /* per-device flags */ 55 __u8 sanyo_slot : 2; /* Sanyo 3 CD changer support */ 56 __u8 keeplocked : 1; /* CDROM_LOCKDOOR status */ 57 __u8 reserved : 5; /* not used yet */ 58 int cdda_method; /* see flags */ 59 __u8 last_sense; 60 __u8 media_written; /* dirty flag, DVD+RW bookkeeping */ 61 unsigned short mmc3_profile; /* current MMC3 profile */ 62 int for_data; 63 int (*exit)(struct cdrom_device_info *); 64 int mrw_mode_page; 65 }; 66 67 struct cdrom_device_ops { 68 /* routines */ 69 int (*open) (struct cdrom_device_info *, int); 70 void (*release) (struct cdrom_device_info *); 71 int (*drive_status) (struct cdrom_device_info *, int); 72 unsigned int (*check_events) (struct cdrom_device_info *cdi, 73 unsigned int clearing, int slot); 74 int (*media_changed) (struct cdrom_device_info *, int); 75 int (*tray_move) (struct cdrom_device_info *, int); 76 int (*lock_door) (struct cdrom_device_info *, int); 77 int (*select_speed) (struct cdrom_device_info *, int); 78 int (*select_disc) (struct cdrom_device_info *, int); 79 int (*get_last_session) (struct cdrom_device_info *, 80 struct cdrom_multisession *); 81 int (*get_mcn) (struct cdrom_device_info *, 82 struct cdrom_mcn *); 83 /* hard reset device */ 84 int (*reset) (struct cdrom_device_info *); 85 /* play stuff */ 86 int (*audio_ioctl) (struct cdrom_device_info *,unsigned int, void *); 87 88 /* driver specifications */ 89 const int capability; /* capability flags */ 90 /* handle uniform packets for scsi type devices (scsi,atapi) */ 91 int (*generic_packet) (struct cdrom_device_info *, 92 struct packet_command *); 93 }; 94 95 /* the general block_device operations structure: */ 96 extern int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev, 97 fmode_t mode); 98 extern void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode); 99 extern int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev, 100 fmode_t mode, unsigned int cmd, unsigned long arg); 101 extern unsigned int cdrom_check_events(struct cdrom_device_info *cdi, 102 unsigned int clearing); 103 extern int cdrom_media_changed(struct cdrom_device_info *); 104 105 extern int register_cdrom(struct cdrom_device_info *cdi); 106 extern void unregister_cdrom(struct cdrom_device_info *cdi); 107 108 typedef struct { 109 int data; 110 int audio; 111 int cdi; 112 int xa; 113 long error; 114 } tracktype; 115 116 extern int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written); 117 extern int cdrom_number_of_slots(struct cdrom_device_info *cdi); 118 extern int cdrom_mode_select(struct cdrom_device_info *cdi, 119 struct packet_command *cgc); 120 extern int cdrom_mode_sense(struct cdrom_device_info *cdi, 121 struct packet_command *cgc, 122 int page_code, int page_control); 123 extern void init_cdrom_command(struct packet_command *cgc, 124 void *buffer, int len, int type); 125 extern int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi, 126 struct packet_command *cgc); 127 128 /* The SCSI spec says there could be 256 slots. */ 129 #define CDROM_MAX_SLOTS 256 130 131 struct cdrom_mechstat_header { 132 #if defined(__BIG_ENDIAN_BITFIELD) 133 __u8 fault : 1; 134 __u8 changer_state : 2; 135 __u8 curslot : 5; 136 __u8 mech_state : 3; 137 __u8 door_open : 1; 138 __u8 reserved1 : 4; 139 #elif defined(__LITTLE_ENDIAN_BITFIELD) 140 __u8 curslot : 5; 141 __u8 changer_state : 2; 142 __u8 fault : 1; 143 __u8 reserved1 : 4; 144 __u8 door_open : 1; 145 __u8 mech_state : 3; 146 #endif 147 __u8 curlba[3]; 148 __u8 nslots; 149 __u16 slot_tablelen; 150 }; 151 152 struct cdrom_slot { 153 #if defined(__BIG_ENDIAN_BITFIELD) 154 __u8 disc_present : 1; 155 __u8 reserved1 : 6; 156 __u8 change : 1; 157 #elif defined(__LITTLE_ENDIAN_BITFIELD) 158 __u8 change : 1; 159 __u8 reserved1 : 6; 160 __u8 disc_present : 1; 161 #endif 162 __u8 reserved2[3]; 163 }; 164 165 struct cdrom_changer_info { 166 struct cdrom_mechstat_header hdr; 167 struct cdrom_slot slots[CDROM_MAX_SLOTS]; 168 }; 169 170 typedef enum { 171 mechtype_caddy = 0, 172 mechtype_tray = 1, 173 mechtype_popup = 2, 174 mechtype_individual_changer = 4, 175 mechtype_cartridge_changer = 5 176 } mechtype_t; 177 178 typedef struct { 179 #if defined(__BIG_ENDIAN_BITFIELD) 180 __u8 ps : 1; 181 __u8 reserved1 : 1; 182 __u8 page_code : 6; 183 __u8 page_length; 184 __u8 reserved2 : 1; 185 __u8 bufe : 1; 186 __u8 ls_v : 1; 187 __u8 test_write : 1; 188 __u8 write_type : 4; 189 __u8 multi_session : 2; /* or border, DVD */ 190 __u8 fp : 1; 191 __u8 copy : 1; 192 __u8 track_mode : 4; 193 __u8 reserved3 : 4; 194 __u8 data_block_type : 4; 195 #elif defined(__LITTLE_ENDIAN_BITFIELD) 196 __u8 page_code : 6; 197 __u8 reserved1 : 1; 198 __u8 ps : 1; 199 __u8 page_length; 200 __u8 write_type : 4; 201 __u8 test_write : 1; 202 __u8 ls_v : 1; 203 __u8 bufe : 1; 204 __u8 reserved2 : 1; 205 __u8 track_mode : 4; 206 __u8 copy : 1; 207 __u8 fp : 1; 208 __u8 multi_session : 2; /* or border, DVD */ 209 __u8 data_block_type : 4; 210 __u8 reserved3 : 4; 211 #endif 212 __u8 link_size; 213 __u8 reserved4; 214 #if defined(__BIG_ENDIAN_BITFIELD) 215 __u8 reserved5 : 2; 216 __u8 app_code : 6; 217 #elif defined(__LITTLE_ENDIAN_BITFIELD) 218 __u8 app_code : 6; 219 __u8 reserved5 : 2; 220 #endif 221 __u8 session_format; 222 __u8 reserved6; 223 __be32 packet_size; 224 __u16 audio_pause; 225 __u8 mcn[16]; 226 __u8 isrc[16]; 227 __u8 subhdr0; 228 __u8 subhdr1; 229 __u8 subhdr2; 230 __u8 subhdr3; 231 } __attribute__((packed)) write_param_page; 232 233 struct modesel_head 234 { 235 __u8 reserved1; 236 __u8 medium; 237 __u8 reserved2; 238 __u8 block_desc_length; 239 __u8 density; 240 __u8 number_of_blocks_hi; 241 __u8 number_of_blocks_med; 242 __u8 number_of_blocks_lo; 243 __u8 reserved3; 244 __u8 block_length_hi; 245 __u8 block_length_med; 246 __u8 block_length_lo; 247 }; 248 249 typedef struct { 250 __u16 report_key_length; 251 __u8 reserved1; 252 __u8 reserved2; 253 #if defined(__BIG_ENDIAN_BITFIELD) 254 __u8 type_code : 2; 255 __u8 vra : 3; 256 __u8 ucca : 3; 257 #elif defined(__LITTLE_ENDIAN_BITFIELD) 258 __u8 ucca : 3; 259 __u8 vra : 3; 260 __u8 type_code : 2; 261 #endif 262 __u8 region_mask; 263 __u8 rpc_scheme; 264 __u8 reserved3; 265 } rpc_state_t; 266 267 struct event_header { 268 __be16 data_len; 269 #if defined(__BIG_ENDIAN_BITFIELD) 270 __u8 nea : 1; 271 __u8 reserved1 : 4; 272 __u8 notification_class : 3; 273 #elif defined(__LITTLE_ENDIAN_BITFIELD) 274 __u8 notification_class : 3; 275 __u8 reserved1 : 4; 276 __u8 nea : 1; 277 #endif 278 __u8 supp_event_class; 279 }; 280 281 struct media_event_desc { 282 #if defined(__BIG_ENDIAN_BITFIELD) 283 __u8 reserved1 : 4; 284 __u8 media_event_code : 4; 285 __u8 reserved2 : 6; 286 __u8 media_present : 1; 287 __u8 door_open : 1; 288 #elif defined(__LITTLE_ENDIAN_BITFIELD) 289 __u8 media_event_code : 4; 290 __u8 reserved1 : 4; 291 __u8 door_open : 1; 292 __u8 media_present : 1; 293 __u8 reserved2 : 6; 294 #endif 295 __u8 start_slot; 296 __u8 end_slot; 297 }; 298 299 extern int cdrom_get_media_event(struct cdrom_device_info *cdi, struct media_event_desc *med); 300 301 static inline void lba_to_msf(int lba, u8 *m, u8 *s, u8 *f) 302 { 303 lba += CD_MSF_OFFSET; 304 lba &= 0xffffff; /* negative lbas use only 24 bits */ 305 *m = lba / (CD_SECS * CD_FRAMES); 306 lba %= (CD_SECS * CD_FRAMES); 307 *s = lba / CD_FRAMES; 308 *f = lba % CD_FRAMES; 309 } 310 311 static inline int msf_to_lba(u8 m, u8 s, u8 f) 312 { 313 return (((m * CD_SECS) + s) * CD_FRAMES + f) - CD_MSF_OFFSET; 314 } 315 #endif /* _LINUX_CDROM_H */ 316